DB2出现错误导致定时代理不能运行是怎么回事？

一个有DB2 ACCESS的domino数据库，定时代理每天晚上会从SAP中读取数据并在domino这边生成文档，同时存入DB2中，DB2与domino的集成方式是IBM lotus平台的默认方式，但在定时代理将运行时出现如下错误，则代理无法运行：

2010-05-06 22:51:28 Admin Process: Searching Administration Requests database
2010-05-06 23:00:36 dzpt/hfcdzpt
DB2-Serialization failure.: 40003 - [IBM][CLI Driver] SQL1224N The database manager is not able to accept new requests, has terminated all requests in progress, or has terminated your particular request due to a problem with your request. SQLSTATE=55032 - (amgr)
2010-05-06 23:00:36 dzpt/hfcdzpt
DB2 NSF failure.: - - (amgr)
2010-05-06 23:00:36 Routine invoked in improper context.: An error occurred accessing the db2 datasource.
2010-05-06 23:01:35 AMgr: Unable to load agent document for '读取收货资料ByEveryDay|Get_PoReceivedList' in 'oadata/app_hfc_checklist11.nsf': Access to the database has been restricted by the administrator

如果在定时代理将运行时或者运行过程中不出现此错误，则代理可正常运行，而且如果在web页面手动调用代理则也可正常运行，哪位高手可否告知一下，不甚感激！！